Nothing is fully undetectable but at the moment it is presumed undetected. There is no VAC for x64 right now and only Live anti-cheat which so far hasn't banned anyone to my knowledge. Like it's been said a thousand times here. Hack at your own risk. There's really no sure way of knowing but that's just the way it is.
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@[MPGH]Lovroman - you got the title wrong :P The title should be Ghosts MP Radar 2.0 V2.1
Fail mention, xD.
What's the point of calling it Radar 2.0 V2.1, yes I know it's second version of better version of ingame radar(second version of second version of normal ingame radar ), but it looks kinda weird.. ?